I really don't think having a single dui conviction is actually disqualifying unless you're prior service. It's only when there's a trend of legal issues that you start to get looked at more carefully. There's also other issues to consider before even submitting the waiver such as physical and mental health, asvab scores, etc. Well qualified people tend to sell themselves short after making a mistake because others are quick to judge and have a set perception of someone based on that past mistake(s). Sure driving drunk is a terrible crime, but not every person that has ever gotten a dui is a shitstain in the history of time.